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This collimator is good for adjusting only the tilt of the lens groups, not the spacing. Andy's scope needs the whole objective to be adjusted, not the individual lens groups. At least that is what I hope, as I have not looked at it yet. My assumption is based on test images that Andy sent me.
If you need a full collimation, you must use the collimator in conjunction with Roddier testing that will tell you how much spherical aberration you have due to incorrect spacing. Not difficult but very time consuming unless you have a suitable optical bench where you can set up and artificial star.
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